Information record medium having two phase pit areas of...

Details Information record medium having two phase pit areas of... Information record medium having two phase pit areas of...

2007-06-19

2007-06-19

Psitos, A M (Department: 2627)

Boots, shoes, and leggings

Orthopedic boot or shoe with corrective element

Arch support

C369S275400

Reexamination Certificate

active

10315932

ABSTRACT:
On an information record medium (1), information is optically recorded and reproduced while a servo control is performed with respect to the information record medium by a push-pull method. The information record medium is provided with: a record/reproduction area (DA) having a groove track (2), which is wobbled and continuously formed and on which the information is recorded and reproduced by a phase changing method by use of a light beam (B) having a wavelength of not less than 630 nm (nanometer) and not more than 680 nm; and a reproduction-dedicated area (RA) where a plurality of phase pits (PI) are wobbled and formed in advance, each having a depth of not less than 60 nm and not more than 90 nm and where only an information reproduction is possible by the light beam.

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